Question:
Would running CLR and water through the system for a few hundred miles help, hurt, or do nothing?
Have you tried a radiator flush at a dealer?
What I was getting at was to get some outside help in what may be just air in the system. The dealer can pull a vacuum on the cooling system and fill the coolant system during the flush procedure and (hopefully) get rid of any trapped air.
While there is no indication that the head-gasket is blown I'm suspecting it is. I'm getting horrible gas milage (and frankly I always have and I don't feel like this car has as much pep as it should.)
I would find the problem affecting performance and mileage. It's my guess that whatever it is, is also causing the overheating.
If his computer is adjusting timing as it reacts to the temps, then the performance and mileage is expected to drop.
If his computer is adjusting timing as it reacts to the temps, then the performance and mileage is expected to drop.
I have noticed the same. With elevated engine temps, performance is cut back.
Do you have a chip?
My '93 runs hotter on the highway on the dyno tune or race tune.
I don't know if it's relevant but I used to have an older Ford that had overheating issues. Tired of messing with it, I sold it only to find out later the timing was turned up too much.
No, I don't have a chip BUT. When I got the car I did flash it to a 98 ECU using an x-cal. (not mine)
Maybe that's the issue? I thought there were no issues with doing this. Maybe I was wrong.
edit: Also, I just thought about this. I flashed the ECU with a 98 Mark but it wasn't an LSC and my mark is an LSC model.
Except for burping that bad boy again about 3-4 times!! Glad you finally found the problem